参考文献
Glemser, O.; Butenuth, G.
Optik (Stuttgart), 1953 , vol. 10, p. 42 - 43
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Glemser, O.; Butenuth, G.
Naturwissenschaften, 1953 , vol. 40, p. 508 - 509
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Gmelin Handbook: Mn: MVol.C2, 2.11.1.5.3.8.3, page 165 - 166